<template>
  <div>
      <!-- 面包屑导航区域 -->
      <el-breadcrumb separator-class="el-icon-arrow-right">
          <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
          <el-breadcrumb-item>权限管理</el-breadcrumb-item>
          <el-breadcrumb-item>角色列表</el-breadcrumb-item>
      </el-breadcrumb>

      <!-- 卡片视图 -->
      <el-card>
          <!-- 添加角色按钮区 -->
          <el-row>
              <el-col>
                  <el-button type="primary">添加角色</el-button>
              </el-col>
          </el-row> 
          <!-- 角色列表区 -->
        <el-table :data="roleList" border stripe>
            <!-- 展开列 -->
            <el-table-column type="expand">
                <template slot-scope="scope">
                    <el-row :class="['bdbottom',i1 === 0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                        <!-- 渲染一级权限 -->
                        <el-col :span="5">
                            <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                            <i class="el-icon-caret-right"></i>
                        </el-col>
                        <!-- 渲染二级和三级权限 -->
                        <el-col :span="19">
                            <!-- 通过for循环嵌套渲染二级权限 -->
                            <el-row :class="[i2 === 0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                <el-col :span="6">
                                    <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                </el-col>
                                <!-- 通过for循环嵌套渲染三级权限 -->
                                <el-col :span="18">
                                    <el-tag @close="removeRightById(scope.row,item3.id)" closable type="warning" v-for="item3 in item2.children" :key="item3.id">{{item3.authName}}</el-tag>
                                </el-col>

                            </el-row>
                        </el-col>
                    </el-row>

                </template>
            </el-table-column>
            <!-- 索引列 -->
            <el-table-column type="index"></el-table-column>
            <el-table-column label="角色名称" prop="roleName"></el-table-column>
            <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
            <el-table-column label="操作" width="300px">
                <template slot-scope="scope" >
                    <el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
                    <el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
                    <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                </template>
            </el-table-column>
        </el-table>
      </el-card>
      <!-- 分配权限的对话框 -->
      <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            @close="setRightDialogClosed"
            >
            <!-- 树形控件 -->
            <el-tree ref="treeRef" show-checkbox :data="rightsList" :props="treeProps" node-key="id" default-expand-all="true" :default-checked-keys="defkeys"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRightDialogVisible = false">取 消</el-button>
                <el-button type="primary"  @click="allotRights">确 定</el-button>
            </span>
            </el-dialog>
  </div>
</template>

<script>
export default {
    data(){
        return{
            // 所有角色列表数据
            roleList:[],
            // 控制分配权限对话框的显示与隐藏
            setRightDialogVisible:false,
            // 所有权限的数据
            rightsList:[],
            // 树形控件的绑定对象
            treeProps:{
                label:'authName',
                children:'children'
            },
            // 默认选中的节点id值数组
            defkeys:[],
            // 当前即将分配权限的角色id
            roleId:''
        }
    },
    created(){
        this.getRolesList()
    },
    methods:{
        // 获取所有角色的列表
        async getRolesList(){
            const {data:res} = await this.$http.get('roles')
            if(res.meta.status !=200){
                return this.$message.console.error(('获取角色列表失败'));
            }
            this.roleList = res.data
        },
        // 根据id删除对应权限
        async removeRightById(role,rightId){
            const confirmResult = await this.$confirm('此操作将永久删除权限，是否继续？','提示',{
                confirmButtonText:'确定',
                canceButtonText:'取消',
                type:'warning'
            }).catch(err=>err)
            if(confirmResult !== 'confirm'){
                return this.$$message.info('取消了删除')
            }
            const {data:res} = await this.$http.delete(`eolrs/${role.id}/rights/${rightId}`)
            if(res.meta.status != 200){
                return this.$$message.error('删除权限失败')
            }
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role){
            this.roleId = role.id
            // 获取所有权限的数据
            const {data:res} = await this.$http.get('rights/tree')
            if(res.meta.status != 200){
                return this.$message.error('获取权限数据失败')
            }
            // 获取到的权限数据保存到data中
            this.roleList = res.data
            // 递归获取三级节点的id
            this.getLeafKeys(role,this.defkeys)
            this.setRightDialogVisible = true
        },
        // 通过递归的形式获取角色下所有三级权限id，并保存到defKeys数组中
        getLeafKeys(node,arr){
            if(!node.children){
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item,arr)
                
            });

        },
        // 监听分配权限对话框的关闭事件
        setRightDialogClosed(){
            this.defkeys = []

        },
        // 点击为角色分配权限
        async allotRights(){
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const {data:res} = await this.$http.post(`roles/${this.roleId/rights}`,{rids:idStr})
            if(res.meta.status != 200){
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRolesList()
            this.setRightDialogVisible = false
        }
    }

}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee;

}
.bdvottom{
    border-bottom: 1px solid #eee;

}
.vcenter{
    display: flex;
    align-items: center;
}

</style>